Originally designed to compete at Le Mans and considered to be “the most significant one-off Works Aston Martin” in existence, the 1963 Aston Martin DP215 Grand Touring Competition Prototype is also one of the most valuable collectible cars in the world. Exuding an almost mythical presence, the history of DP215 is one of heartbreak and accomplishment that marks the end of an era for the British automaker. Lovingly restored over a 40-year period with extensive consultation from the car’s original designer, DP215 now heads to the block later this month at the RM Sotheby’s event in Monterey, where it may very well become the most valuable British car ever sold at public auction.